\begin{tikzpicture}
    \tkzDefPoints{0/0/A, 3/0/B, -1/1.5/D, 2/1.5/C}

    \tkzDrawPolygon(A,B,C,D)
    \tkzDrawSegments(A,C)
    \tkzMarkSegments[mark=|](A,B  C,D)
    \tkzMarkSegments[mark=||](A,D  B,C)
    \tkzLabelPoints[above](C,D)
    \tkzLabelPoints[below](A,B)
\end{tikzpicture}

